True or False: Compost is commonly used in professional grower mixes.

Compost is indeed commonly used in professional grower mixes, which makes the claim that it is false incorrect. In many professional horticultural practices, compost is a valuable component because it enhances soil structure, increases moisture retention, and provides essential nutrients to plants. It improves the microbial activity in the soil, fostering a healthier growing environment.

Professional growers often mix compost with other materials to create a well-balanced growing medium that supports plant health and growth. This is not limited to organic mixes or home gardening; rather, it is a standard practice that benefits a wide range of plants and growing conditions. Hence, the assertion that compost is not used in professional grower mixes does not align with common practices in the horticultural industry.